Silica fume undensified

Microsilica increases the compression and abrasion resistance of high-performance concrete and high compactness make concrete ag

 

   Microsilica or Silica fume

 

      Microsilica has historically been considered a waste product. However, from the mid of 1970s,microsilica has discovered as a new-style special materials, which can be used in a variety of productive ways. Microsilica increases the compression and abrasion resistance of high-performance concrete and high compactness make concrete against the attack from other chemical elements. In the refractory industry, microsilica increases high temperature strength and thermal conductivity in castables.

ROPERTIES&SPECIFICATIONS

 

PROPERTIES
State	Non-amorphous Ultrafine (non-crystalline) poweder
Color	Grey to medium grey powder
Bulk density-Densified	500-700KG/M3
Bulk density-Undensified	200-350KG/M3
SPECIFICATIONS
SiO2(Silicon Dioxide)	Min.95%
H2O	Max.1.0%
Loss on ignition	Max.3%
Fe2O3	Max.0.5%
Al2O3	Max 0.45%
CaO	Max.0.70%
MgO	Max.0.5%
K2O	Max 0.85%
Retained on 45micron sieve	Max.6.0%
Pozzolanic Activity Index	105@7d

 

Packaging:Packaging:UV 300kgs/bag for undensified &900kgs/bag for densified 

Micro silica in Refractory

1) The micro silica is as a raw material, commonly used in the refractory industry. It plays an important role to improve monolithic refractories. 2) Microsilica is filled in those gaps of which in the traditional refractories. Thus, it increases the bulk density and lowers the porosity, so that intensity can be increased abviously. 3) Micro silica contains strong activity to form colloidal particles in the water, and adding suitable dispersant to enhance liquidity, thereby improving performance casting. 4) Microsilica is easy to form -Si-OH in the water and has strong hydrophilicity and activity. It can enhance the cohesion of refractories, in the meantime, it also improves greatly the high temperature properties and extends the life of refractory products.  5) Enhance the fluid of pouring refractory6) Reduce the volume of used water7) Raise the production efficiency8) Be easy to shape9) Micro silica in refractory is a highly effective pozzolanic material10) Enhance elevated temperature strength and thermal shock of refractory11) Improves adhesion in castable and minimizes rebound loss

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Silica fume undensified